Dr. Michael A. Mathier

Gavin W. Hickey, MD, is an advanced heart failure and transplant, pulmonary hypertension cardiologist and is board-certified in cardiovascular disease, advanced heart failure and transplant, and echocardiography by the American Board of Internal Medicine and the American Society of Echocardiography. Dr. Hickey is highly rated in 9 conditions, according to our data. His clinical expertise encompasses Cardiogenic Shock, Heart Failure, Heart Attack, Pulmonary Hypertension, and Heart Transplant. Dr. Hickey is board certified in National Board Of Echocardiography, American Board Of Internal Medicine , and American Board Of Internal Medicine . Dr. Hickey is currently accepting new patients.

Dr. Raina is Director of the Advanced Heart Failure Cardiology and Pulmonary Hypertension Programs at Allegheny General Hospital and Professor of Medicine at Drexel University School of Medicine. He is a nationally renowned physician with expertise in diagnosing and managing advanced heart failure, heart transplant care, mechanical circulatory support, and pulmonary hypertension. He is also an experienced echocardiographer with expertise in interventional echocardiography, using advanced heart imaging to help guide care for patients with complex heart conditions. His clinical and research interests focus on advanced imaging of the right ventricle in pulmonary arterial hypertension and in patients with mechanical circulatory support. He has published extensively in this field, including numerous peer-reviewed manuscripts, abstracts, and book chapters. Dr. Raina was named one of Pittsburgh Magazine’s “Best Doctors” from 2019 through 2025. Dr. Raina is highly rated in 10 conditions, according to our data. His clinical expertise encompasses Pulmonary Hypertension, Hypertension, Cardiomyopathy, Lung Transplant, and Heart Transplant. Dr. Raina is board certified in American Board Of Internal Medicine - Advanced Heart Failure And Transplant Cardiology and American Board Of Internal Medicine - Cardiovascular Disease.

Mary E. Keebler, MD is a cardiologist and is certified in advanced heart failure and transplant cardiology and cardiovascular disease by the American Board of Internal Medicine. She is the director of the section of heart failure and pulmonary hypertension and the medical director of advanced heart failure at UPMC. She is an associate professor of medicine at the University of Pittsburgh School of Medicine. Dr. Keebler received her medical degree from Tulane University Medical School, New Orleans, and completed her internal medicine residency and cardiology fellowship at Massachusetts General Hospital with additional fellowship training in heart failure at Boston University Medical Center.Dr. Keebler joined the UPMC Heart and Vascular Institute in 2018. Her clinical interests include heart failure, cardiogenic shock, heart transplantation, and mechanical circulatory support. Dr. Keebler has published numerous articles in peer-reviewed journals and is an active member of the Heart Failure Society of America and the International Society of Heart and Lung Transplantation. She also serves on national steering committees and writing groups for studies in mechanical circulatory support. In her free time, she enjoys spending time with her husband, two children, and two dogs, running, listening to music, and watching sports.View Dr. Keebler's full list of publications from PubMed. Dr. Keebler is highly rated in 5 conditions, according to our data. Her clinical expertise encompasses Heart Failure, Pulmonary Edema, Cardiogenic Shock, Cardiomyopathy, and Heart Transplant. Dr. Keebler is board certified in American Board Of Internal Medicine and American Board Of Internal Medicine. Dr. Keebler is currently accepting new patients.